Surgeons at a Philadelphia hospital have separated 8 month old twin girls! There were joined at the lower chest and abdomen, and the procedure took a grueling 7 hours.

In the end, it was totally worth it because Allison and Amelia Tucker were completely separate by the afternoon. They shared their chest wall, diaphragm, pericardium and liver, and it's said they were "excellent candidates" for separation.

The doctor says the twins will be monitored closely during their recovery and should be able to live "full, healthy and independent lives."